DE1257413B - Device for providing hollow plastic bodies with socket ends, ring grooves and thickened walls - Google Patents

Device for providing hollow plastic bodies with socket ends, ring grooves and thickened walls

Info

Publication number
DE1257413B
DE1257413B DER32451A DER0032451A DE1257413B DE 1257413 B DE1257413 B DE 1257413B DE R32451 A DER32451 A DE R32451A DE R0032451 A DER0032451 A DE R0032451A DE 1257413 B DE1257413 B DE 1257413B
Authority
DE
Germany
Prior art keywords
segments
dome
mold
hollow body
mandrel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
DER32451A
Other languages
German (de)
Inventor
Heinrich Kuhlemann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rehau Plastiks GmbH
Original Assignee
Rehau Plastiks GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rehau Plastiks GmbH filed Critical Rehau Plastiks GmbH
Priority to DER32451A priority Critical patent/DE1257413B/en
Priority to AT476362A priority patent/AT261197B/en
Priority to US631735A priority patent/US3553780A/en
Publication of DE1257413B publication Critical patent/DE1257413B/en
Priority to US798517*A priority patent/US3557278A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C57/00—Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor, e.g. collapsible mandrels
    • B29C57/02—Belling or enlarging, e.g. combined with forming a groove
    • B29C57/04—Belling or enlarging, e.g. combined with forming a groove using mechanical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
    • B29C33/48—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles with means for collapsing or disassembling
    • B29C33/485—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles with means for collapsing or disassembling cores or mandrels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C57/00—Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor, e.g. collapsible mandrels
    • B29C57/02—Belling or enlarging, e.g. combined with forming a groove
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D1/00—Producing articles with screw-threads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/22—Tubes or pipes, i.e. rigid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/24—Pipe joints or couplings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
    • Y10S425/218—Pipe machine: socket forming apparatus

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Description

BUNDESREPUBLIK DEUTSCHLANDFEDERAL REPUBLIC OF GERMANY

DEUTSCHESGERMAN

PATENTAMTPATENT OFFICE

AUSLEGESCHRIFTEDITORIAL

Int. CL: Int. CL:

B29cB29c

Deutsche KL: 39 a2-17/02 German KL: 39 a2- 17/02

Nummer: 1257413Number: 1257413

Aktenzeichen: R 32451X/39 a2File number: R 32451X / 39 a2

Anmeldetag: 9. April 1962 Filing date: April 9, 1962

Auslegetag: 28. Dezember 1967Open date: December 28, 1967

Zur Herstellung von Leitungen werden Kunststoffrohre benötigt, deren Enden zu Muffen gestaltet und mit einer Ringnut versehen sind. Bisher war es zur Herstellung von derartigen Muffenenden erforderlich, auf die Kunststoffrohre einen gesonderten Preßteil aufzuschieben, der in seinem Profil dem gewünschten Muffenstück mit der erforderlichen Wandverdickung entspricht. Die Befestigung dieser aufgeschobenen Preßteile an dem Kunststoffrohr erfolgt dabei mit Hilfe eines Klebemittels. Dieses Verfahren ist jedoch umständlich und kostspielig. For the production of lines, plastic pipes are required, the ends of which are designed and made into sleeves are provided with an annular groove. So far it was necessary for the production of such socket ends, to push a separate pressed part on the plastic pipes, which in its profile the desired socket piece with the required wall thickening. The attachment of this Pressed parts pushed onto the plastic pipe are carried out with the aid of an adhesive. However, this procedure is cumbersome and expensive.

Gegenstand der Erfindung ist nun eine Vorrichtung, mit deren Hilfe es möglich ist, Kunststoffrohre und ähnliche Kunststoffhohlkörper in einem einzigen Arbeitsgang durch Pressen und Stauchen mit einer mit Ringnut und verdickten Wänden ausgestatteten Muffe zu versehen. Diese Vorrichtung, die einen durch zwei Backen gebildeten, der herzustellenden Muffe im äußeren Querschnitt entsprechenden zylindrischen Hohlkörper aufweist, ist dadurch gekennzeichnet, daß sich in dem zylindrischen Hohlkörper ein ebenfalls zylindrischer Hohlkörper, dessen Mantel durch jeweils gegenüberliegende und gegeneinander bewegbare Segmente gebildet ist, befindet und daß eine Vorrichtung zum Einpressen und Stauchen des Rohrendes in die durch beide Hohlkörper gebildete Form vorgesehen ist. Die Segmente umgeben bei einer bevorzugten Ausführungsform der Erfindung einen beweglichen Dorn, der Aussparungen zur Aufnahme von zwei gegenüberliegenden Segmenten aufweist. In diese Aussparungen werden die beiden gegenüberliegenden Segmente beim Entformen eingezogen. Nach erfolgter Entnahme des Domes mit diesen beiden in den Aussparungen befindlichen Segmenten lassen sich dann auch die beiden einander gegenüberliegenden, noch im äußeren zylindrischen Hohlkörper befindlichen Segmente relativ zueinander bewegen, wodurch eine vollständige Entnahme des Kernes aus der Form bzw. die Entformung des in der Form gebildeten Muffenkörpers ermöglicht wird. Die in die Aussparungen des Domes einziehbaren Segmente sind zweckmäßigerweise an einem im Inneren des Domes angeordneten Zugkeil gleitbar befestigt. Die beiden anderen Segmente sind vorteilhafterweise an einer Platte mittels verschiebbarer Schlitten beweglich angeordnet.The invention now relates to a device with the help of which it is possible to make plastic pipes and similar hollow plastic bodies in a single operation by pressing and upsetting to provide a socket equipped with an annular groove and thick walls. This device that one formed by two jaws, corresponding to the sleeve to be produced in the outer cross-section having a cylindrical hollow body, is characterized in that in the cylindrical hollow body a likewise cylindrical hollow body, the jacket of which is formed by opposite and against each other movable segments is formed, and that a device for pressing and upsetting of the pipe end is provided in the shape formed by both hollow bodies. Surround the segments in a preferred embodiment of the invention a movable mandrel, the recesses has to accommodate two opposing segments. The two opposing segments drawn in during demolding. After removing the dome with These two segments located in the recesses can then also be mutually linked opposite segments still located in the outer cylindrical hollow body relative to one another move, whereby a complete removal of the core from the mold or the demolding of the in the Form formed sleeve body is made possible. The segments that can be retracted into the recesses in the dome are expediently slidably attached to a tension wedge arranged in the interior of the dome. The other two segments are advantageously movable on a plate by means of displaceable carriages arranged.

Die erfindungsgemäße Vorrichtung ist an Hand der F i g. I bis XII näher erläutert. Es zeigtThe device according to the invention is illustrated in FIGS. I to XII explained in more detail. It shows

Fig.I eine Darstellung der Vorrichtung im seitlichen Schnitt in geöffnetem Zustand der Form, Fig.II die Form der in Fig.I dargestellten Vor-Fig.I a representation of the device in the side Section in the open state of the mold, Fig. II the shape of the pre-set shown in Fig.

Vorrichtung zum VersehenDevice for oversight

von Kunststoffhohlkörpem mit Muffenenden,of plastic hollow bodies with socket ends,

Ringnut und verdickten WändenRing groove and thickened walls

Anmelder:Applicant:

Rehau-Plastiks G. m. b. H.,
Rehau (Bay.)Rehau-Plastiks G. mb H.,
Rehau (Bay.)

Als Erfinder benannt:Named as inventor:

Heinrich Kuhlemann, Rehau (Bay.)Heinrich Kuhlemann, Rehau (Bay.)

richtung in geschlossenem Zustand, ebenfalls im seitlichen Schnitt,direction in the closed state, also in the side cut,

F i g. ΙΠ die Form der in F i g. I gezeigten Vorrichtung in geschlossenem Zustand, in Draufsicht dargestellt, F i g. ΙΠ the form of the in F i g. I shown device in the closed state, shown in plan view,

F i g. IV die Form der in F i g. I dargestellten Vorrichtung in geöffnetem Zustand, im seitlichen Schnitt dargestellt,F i g. IV the form of the in FIG. I device shown in the open state, in side section shown,

Fig.V einen Teil der in Fig.IV dargestellten Form in Draufsicht in geschlossenem Zustand,Fig.V a part of the shown in Fig.IV Form in top view when closed,

F i g. VI eine Seitenansicht der F i g. V,F i g. VI is a side view of FIG. V,

Fig.VII den in Fig.V dargestellten Teil in geöffnetem Zustand der Form,Fig.VII the part shown in Fig.V in the open State of shape,

Fig. VIII eine Seitenansicht der Fig. VII,
Fig. IX den Kern der in Fig. II dargestellten Form in seitlichem Schnitt,FIG. VIII shows a side view of FIG. VII,
IX shows the core of the form shown in FIG. II in a lateral section,

Fig.X einen Schnitt längs LinieΙ-Γ der Fig.IX,Fig.X a section along line-Γ of Fig.IX,

Fig. XI einen Schnitt längs Linie Π-ΙΓ des in F i g. IX dargestellten Kernes,Fig. XI a section along line Π-ΙΓ of the in F i g. IX illustrated core,

Fig.XII einen Schnitt längs Linie ΙΙΙ-ΠΙ' der Fig. IX.Fig.XII a section along line ΙΙΙ-ΠΙ 'the Fig. IX.

Die Vorrichtung weist zur Verformung des Rohrendes eine Form auf, die aus den beiden halbzylindrischen Backen 1 als Außenwandung und dem Dom 3 und den Segmenten 4, 5,6,7 als Kern besteht. Die Backen 1 sind mit einer Heiz- und Kühlvorrichtung 2 versehen und können mittels der Zylinder 19 und 20 relativ zueinander bewegt werden, wodurch ein Öffnen und Schließen der Form ermöglicht wird. Die Vorrichtung weist weiter eine Halterung 23 mit Druckzylinder 21 auf, die das zu verformende Rohr hält, wenn dieses mit seinem Ende 10 in die Form gepreßt wird. Der Preßdruck wird mit Hilfe des hydraulischen Zylinders 22 erzeugt.
Der aus den Segmenten 4,5,6,7 und dem Dom 3 bestehende Formkern ist so gestaltet, daß er nach erfolgter Verformung aus dem Rohrende entferntThe device has a shape for deforming the pipe end which consists of the two semi-cylindrical jaws 1 as the outer wall and the dome 3 and the segments 4, 5, 6, 7 as the core. The jaws 1 are provided with a heating and cooling device 2 and can be moved relative to one another by means of the cylinders 19 and 20, which enables the mold to be opened and closed. The device further has a holder 23 with a pressure cylinder 21 which holds the tube to be deformed when this is pressed with its end 10 into the mold. The pressing pressure is generated with the aid of the hydraulic cylinder 22 .
The mold core consisting of the segments 4,5,6,7 and the dome 3 is designed so that it is removed from the pipe end after the deformation has taken place

709710/579709710/579

Claims (4)

werden kann. Hierzu sind die einander gegenüberliegenden seitlichen Segmente 4 und 5 relativ zueinander beweglich in Aussparungen im Dorn 3 angeordnet. Ihr Abstand zueinander ist durch einen im Inneren des Domes 3 angeordneten, in Längsrichtung verschiebbaren, sich konisch verjüngenden Zugkeil 11 einstellbar. Durch Einziehen des Zugkeiles 11 in den Dorn 3 werden dementsprechend die Segmente 4 und 5 in das Innere des Domes 3 gezogen, der danach aus der Form herausgezogen werden kann. Nach dem Entfernen des Domes 3 mit den Segmenten 4 und 5 lassen sich die Segmente 6 und 7 ebenfalls gegeneinander verschieben. Die Segmente 6 und 7 sind hierzu auf einer Platte 12 an den zur Mitte verschiebbaren Schlitten 13 und 14 angeordnet. Zur Durchführung des erfindungsgemäßen Verfahrens wird das erwärmte Rohrende 10, wie in F i g. II und ΠΙ dargestellt, durch den Schlitz 9 in die beheizte Form eingeführt, wo die Verformung erfolgt. Anschließend wird abgekühlt, damit die gepreßte Muffe formbeständig wird und aus der Form entnommen werden kann. Nach erfolgter Abkühlung werden zunächst die Backen 1 durch Betätigung der Druckzylinder 19 und 20 voneinander getrennt. Hierauf werden die Segmente 4 und 5 durch Betätigung des Zugkeils 11 in den Dorn 3 eingezogen, der da- · nach aus der Form gezogen wird. Schließlich verschiebt man noch die Segmente 6 und 7 gegeneinander zur Mitte hin. Die Muffe liegt nun vollkommen frei und kann aus der Vorrichtung durch Zurückfahren der Halterung 23 und anschließendes Öffnen der Halterung 23 entnommen werden. Die erfindungsgemäße Vorrichtung ist so ausgestaltet, daß das Öffnen und Schließen der Form automatisch erfolgt. Hierzu sind zur Betätigung der Backen 1 die Zylinder 19 und 20 vorgesehen. Die Betätigung des Zugkeiles 11 erfolgt mit Hilfe des Zylinders 18, die des Domes 3 mit HiKe des Zylinders 17. Zur Betätigung der Segmente 6 und 7 dienen die Zylinder 15 und 16. Patentansprüche:can be. For this purpose, the opposite side segments 4 and 5 are arranged in recesses in the mandrel 3 so as to be movable relative to one another. Their distance from one another is adjustable by a conically tapering tension wedge 11 arranged in the interior of the dome 3, displaceable in the longitudinal direction. By pulling the tension wedge 11 into the mandrel 3, the segments 4 and 5 are accordingly drawn into the interior of the dome 3, which can then be pulled out of the mold. After removing the dome 3 with the segments 4 and 5, the segments 6 and 7 can also be moved against each other. For this purpose, the segments 6 and 7 are arranged on a plate 12 on the slides 13 and 14 which can be moved towards the center. To carry out the method according to the invention, the heated pipe end 10, as shown in FIG. II and ΠΙ shown, inserted through the slot 9 in the heated mold, where the deformation takes place. It is then cooled so that the pressed sleeve is dimensionally stable and can be removed from the mold. After cooling has taken place, the jaws 1 are first separated from one another by actuating the pressure cylinders 19 and 20. The segments 4 and 5 are then drawn into the mandrel 3 by actuating the tension wedge 11, which is then pulled out of the mold. Finally, you move the segments 6 and 7 against each other towards the center. The sleeve is now completely free and can be removed from the device by retracting the holder 23 and then opening the holder 23. The device according to the invention is designed so that the opening and closing of the mold takes place automatically. For this purpose, the cylinders 19 and 20 are provided for actuating the jaws 1. The actuation of the tension wedge 11 takes place with the aid of the cylinder 18, that of the dome 3 with the back of the cylinder 17. The cylinders 15 and 16 are used to actuate the segments 6 and 7. 1. Vorrichtung zum Versehen von Kunststoffhohlkörpern beliebiger Länge, insbesondere von Kunststoffrohren, mit Muffenenden, Ringnut und verdickten Wänden, bestehend aus einem durch zwei Backen gebildeten, der herzustellenden Muffe im äußeren Querschnitt entsprechenden zylindrischen Hohlkörper, dadurchgekennzeichnet, daß sich in dem zylindrischen Hohlkörper ein ebenfalls zylindrischer Hohlkörper, dessen Mantel durch jeweils gegenüberliegende und gegeneinander bewegbare Segmente (4,5 und 6,7) gebildet ist, befindet und daß eine Vorrichtung zum Einpressen und Stauchen des Rohrendes in die durch beide Hohlkörper gebildete Form vorgesehen ist.1. Device for providing hollow plastic bodies of any length, in particular of Plastic pipes, with socket ends, ring groove and thickened walls, consisting of a through two jaws formed, corresponding to the sleeve to be produced in the outer cross-section cylindrical hollow body, characterized in that in the cylindrical hollow body a likewise cylindrical hollow body, the jacket of which is provided by opposite one another and mutually movable segments (4,5 and 6,7) is formed, and that a device for pressing and upsetting the pipe end into the hollow body formed by the two Form is provided. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Segmente (4,5,6,7) einen beweglichen Dorn (3) umgeben, der Aussparungen zur Aufnahme der Segmente (4,5) aufweist.2. Apparatus according to claim 1, characterized in that the segments (4,5,6,7) one Surrounding movable mandrel (3) which has recesses for receiving the segments (4,5). 3. Vorrichtung nach Ansprach 1 und 2, dadurch gekennzeichnet, daß die Segmente (4,5) an einem im Inneren des Domes (3) angeordneten Zugkeil (11) gleitbar befestigt sind.3. Device according to spoke 1 and 2, characterized in that the segments (4,5) on are slidably attached to a tension wedge (11) arranged in the interior of the dome (3). 4. Vorrichtung nach Anspruch 1 bis 3, dadurch gekennzeichnet, daß die Segmente (6,7) an einer Platte (12) mittels verschiebbarer Schlitten (13,14) beweglich angeordnet sind.4. Apparatus according to claim 1 to 3, characterized in that the segments (6,7) on a plate (12) are movably arranged by means of displaceable carriages (13, 14). In Betracht gezogene Druckschriften:
Britische Patentschriften Nr. 771368,798 692.Considered publications:
British Patent Specification No. 771368,798,692. Hierzu 2 Blatt ZeichnungenFor this purpose 2 sheets of drawings 709 710/579 12.67 © Bundesdruckerei Berlin709 710/579 12.67 © Bundesdruckerei Berlin
DER32451A 1962-04-09 1962-04-09 Device for providing hollow plastic bodies with socket ends, ring grooves and thickened walls Pending DE1257413B (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DER32451A DE1257413B (en) 1962-04-09 1962-04-09 Device for providing hollow plastic bodies with socket ends, ring grooves and thickened walls
AT476362A AT261197B (en) 1962-04-09 1962-06-13 Method and device for producing a sleeve-shaped end on plastic hollow bodies, in particular on plastic pipes
US631735A US3553780A (en) 1962-04-09 1967-04-18 Apparatus for forming a socket-shaped end on plastic pipes
US798517*A US3557278A (en) 1962-04-09 1968-10-30 Method for forming a socket shaped end on plastic pipes

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DER32451A DE1257413B (en) 1962-04-09 1962-04-09 Device for providing hollow plastic bodies with socket ends, ring grooves and thickened walls
US63173567A 1967-04-18 1967-04-18
US79851768A 1968-10-30 1968-10-30

Publications (1)

Publication Number Publication Date
DE1257413B true DE1257413B (en) 1967-12-28

Family

ID=27212112

Family Applications (1)

Application Number Title Priority Date Filing Date
DER32451A Pending DE1257413B (en) 1962-04-09 1962-04-09 Device for providing hollow plastic bodies with socket ends, ring grooves and thickened walls

Country Status (2)

Country Link
US (1) US3557278A (en)
DE (1) DE1257413B (en)

Families Citing this family (20)

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Publication number Priority date Publication date Assignee Title
JPS5427392B2 (en) * 1971-10-12 1979-09-10
JPS5426593B2 (en) * 1971-10-12 1979-09-05
US3825392A (en) * 1972-08-14 1974-07-23 Dickey W Clay Mfg Co Apparatus for forming pipe coupling
US3966385A (en) * 1973-12-07 1976-06-29 Wayne Spears Apparatus for forming a groove in a tube
US3949045A (en) * 1974-02-22 1976-04-06 Hess William L Extruded pipe coupling and method and apparatus for forming
US4143112A (en) * 1974-05-30 1979-03-06 Johnson & Johnson Method for making probe covers for electronic thermometers
US4044092A (en) * 1974-11-29 1977-08-23 Wayne Spears Groove molding method
FI55139C (en) * 1975-01-20 1979-06-11 Asko Upo Oy RELEASE FITTING FOR PLASTICS AND PLASTIC EQUIPMENT
JPS59366B2 (en) * 1975-08-19 1984-01-06 株式会社クボタ Goseijiyushiseiyoukanagata
US4113829A (en) * 1976-02-09 1978-09-12 Philips Industries Inc. Method of forming a bell end on thermoplastic pipe
US4113813A (en) * 1977-04-25 1978-09-12 Wilson-Tek Corporation Method of preparing and belling thermoplastic pipe with thickened walls
PH16346A (en) * 1978-10-03 1983-09-05 Kubota Ltd Method of forming a socket end on a plastic pipe and a molding device for use of the method
NL1002604C2 (en) * 1996-03-13 1997-09-17 Wavin Bv Method of forming a sleeve on a tube of biaxially oriented polyvinyl chloride.
US5879723A (en) * 1996-03-26 1999-03-09 United States Brass Corporation Automated tube reforming apparatus
US5756023A (en) * 1996-05-30 1998-05-26 United States Brass Corporation Method of producing reformed crosslinked polyethylene articles
US6361842B1 (en) 1996-05-30 2002-03-26 United States Brass Corporation Reformed crosslinked polyethylene articles
US6284178B1 (en) 1999-06-18 2001-09-04 United States Brass Corporation Methods of producing crosslinked polyethylene products
US20030219558A1 (en) * 2002-05-22 2003-11-27 Johnson John Woody Method and apparatus for restoring the necked-down end of a tubular core
US7942456B2 (en) * 2008-01-04 2011-05-17 Cerro Flow Products, Inc. Fluid conduits with integral end fittings and associated methods of manufacture and use
US7987690B2 (en) * 2008-01-04 2011-08-02 Cerro Flow Products Llc Fluid conduits with integral end fittings and associated methods of manufacture and use

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB771368A (en) * 1955-04-06 1957-04-03 British Insulated Callenders Improvements in a method and apparatus for forming collars on the ends of thermoplastic tubes
GB798692A (en) * 1955-05-26 1958-07-23 Yorkshire Copper Works Holding Improvements in or relating to moulds or other flanging means for pipe ends

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB771368A (en) * 1955-04-06 1957-04-03 British Insulated Callenders Improvements in a method and apparatus for forming collars on the ends of thermoplastic tubes
GB798692A (en) * 1955-05-26 1958-07-23 Yorkshire Copper Works Holding Improvements in or relating to moulds or other flanging means for pipe ends

Also Published As

Publication number Publication date
US3557278A (en) 1971-01-19

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